də̇ˌsijəˈwōmə, dē- noun
( plural deciduomas or de·ciduo·ma·ta -məd.ə, -ətə)
Etymology: New Latin, from decidua + -oma
1. : a mass of tissue formed in the uterus following pregnancy that contains remnants of chorionic or decidual tissue
2. : decidual tissue induced in the uterus (as by trauma) in the absence of pregnancy